CN213193225U - Reverse osmosis device and reverse osmosis system - Google Patents

Abstract

The utility model provides a reverse osmosis device and a reverse osmosis system, wherein the reverse osmosis device comprises a water inlet pipe, a water storage bin, a reverse osmosis membrane cavity, a concentrated water bin, a concentrated water drain pipe, a reverse osmosis fresh water bin, a fresh water outlet and a reverse osmosis membrane which is longitudinally arranged in the reverse osmosis membrane cavity, the water storage bin is positioned above the reverse osmosis membrane cavity, and the water storage bin is provided with a water inlet pipe; the concentrated water bin and the reverse osmosis fresh water bin are positioned below the reverse osmosis membrane cavity, and a concentrated water drain pipe is arranged on the concentrated water bin; the reverse osmosis membrane cavity is through reverse osmosis membrane upper end intercommunication water storage storehouse, through reverse osmosis membrane lower extreme intercommunication concentrated water storehouse, and reverse osmosis membrane has central collector pipe, and the lower extreme intercommunication reverse osmosis fresh water storehouse of central collector pipe, the fresh water export has been seted up to the bottom in reverse osmosis fresh water storehouse. The utility model discloses but independent use or a plurality of ally oneself with uses, reverse osmosis membrane vertically sets up, can upgrade membrane group quantity as required, and water treatment capacity is big, and is simple to handle, and water flows down because of gravity and forms vertical packing force and reach sealed effect for the work load of pump reduces.

Description

Reverse osmosis device and reverse osmosis system

Technical Field

The utility model relates to the field of machinary, in particular to purified water preparation system specifically is a reverse osmosis unit and reverse osmosis system.

Background

The purified water is deionized water which is prepared by a filtration method, a distillation method, an ion exchange method, a reverse osmosis method and other methods and meets the national relevant standards, and is widely applied to the fields of biology, pharmacy, food and the like. The purified water equipment is used for preparing purified water meeting the requirements of various industries, and impurities, particles, colloids, heavy metal ions, microorganisms, heat sources and the like in raw water (tap water and natural water) are removed through processes such as filtration and EDI (electronic data interchange) so that the water is pure enough to meet the water consumption requirements of purified water in pharmaceutical factories, hospitals and the like.

The existing purified water making equipment system needs a reverse osmosis device, as shown in fig. 1, which is a reverse osmosis device in the prior art: the device comprises a support 701 and a plurality of first-stage reverse osmosis devices which are arranged on the support 701 in parallel, each first-stage reverse osmosis device comprises a shell 707, a first-stage reverse osmosis membrane 703, two sealing rings 705, a fresh water outlet pipe 708, a pipe penetrating end cover 710 and a blind plate end cover 712, wherein the shell 707 is cylindrical and is transversely arranged on the support 701, the pipe penetrating end cover 710 is arranged in one end of the shell 707, the blind plate end cover 712 is arranged in the other end of the shell 707, the pipe penetrating end cover 710 is connected with the shell 707 in a sealing way, the blind plate end cover 712 is connected with the shell 707 in a sealing way, the first-stage reverse osmosis membrane 703 is positioned between the pipe penetrating end cover 710 and the blind plate end cover 712, two sealing rings 705 for isolating the inner cavity of the shell 707 are respectively arranged on the side surfaces of two ends of the first-stage reverse osmosis membrane 703, one end of a first-stage, a water inlet 702 is arranged on the outer shell between the pipe penetrating end cover 710 and the sealing ring 705 at one end of the first-stage reverse osmosis membrane 703, and a concentrated water drainage port 709 is arranged on the outer shell between the blind flange end cover 712 and the sealing ring 705 at the other end of the first-stage reverse osmosis membrane 703. The direction of the arrows in the figure is the direction of water flow.

The existing reverse osmosis device is usually fixedly installed, the membrane groups are transversely arranged, the occupied area is large, the requirement on the site is high, and the number and the combination form of the reverse osmosis membrane groups cannot be upgraded after the installation is finished, so that the water production efficiency and the water production quality cannot be improved; the reverse osmosis membrane maintenance needs double-person operation, and the later maintenance is inconvenient; meanwhile, water leakage in the membrane shell easily occurs, two ends of the outer part of the membrane shell easily leak, the requirement on the installation process is high, the booster pump is loaded, and the energy consumption is high.

SUMMERY OF THE UTILITY MODEL

The above-mentioned problem to prior art exists, the utility model aims at providing a reverse osmosis unit and reverse osmosis system, reverse osmosis unit can use or a plurality of antithetical couplet usefulness, and reverse osmosis membrane is vertical setting among the reverse osmosis unit, can upgrade membrane group number according to the productivity demand, through the cluster, the parallelly connected installation of a plurality of reverse osmosis membranes, realizes bigger water treatment capacity. The reverse osmosis device is also provided with a fixed limiting structure, so that the working load of the pump is reduced due to the fact that water flows from top to bottom due to gravity, the energy-saving effect is achieved, meanwhile, pressing force is generated, and the sealing effect is greatly improved; the device is simple and convenient to install and overhaul, can be operated by a single person, reduces the error risk in the operation process, and is light in size and convenient in structure, and the occupied area of the equipment is saved.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

a reverse osmosis device comprises a water storage bin, a reverse osmosis membrane cavity, a concentrated water bin, a reverse osmosis fresh water bin and a reverse osmosis membrane longitudinally arranged in the reverse osmosis membrane cavity; the water storage bin is positioned above the reverse osmosis membrane cavity, and a water inlet pipe is arranged on the water storage bin; the concentrated water bin and the reverse osmosis fresh water bin are positioned below the reverse osmosis membrane cavity, and a concentrated water drain pipe is arranged on the concentrated water bin; the reverse osmosis membrane cavity is communicated with the water storage bin through the upper end of a reverse osmosis membrane and is communicated with the concentrated water bin through the lower end of the reverse osmosis membrane, the reverse osmosis membrane is provided with a central water collecting pipe, and the lower end of the central water collecting pipe is communicated with the reverse osmosis fresh water bin; and a fresh water outlet is formed in the bottom of the reverse osmosis fresh water bin.

As a further improvement of the above technical solution:

the reverse osmosis membrane can be provided in one or more.

Further, the reverse osmosis device comprises a tank body, an upper cover, a water storage bin clapboard, a concentrated water bin clapboard, a fresh water bin clapboard and a lower bottom cover; the tank body is a cylinder body, the upper end part and the lower end part of the tank body are respectively connected with the upper cover and the lower bottom cover, the fresh water bin partition plate, the concentrated water bin partition plate and the water storage bin partition plate are sequentially installed in the tank body from bottom to top at intervals, and the inner cavity of the tank body is divided into the reverse osmosis fresh water bin, the concentrated water bin, the reverse osmosis membrane cavity and the water storage bin.

The internal wall of jar is multistage echelonment along the central line direction of jar body, from up being first order ladder, second grade ladder and third grade ladder down in proper order, fresh water storehouse baffle, dense water storehouse baffle and water storage storehouse baffle are installed respectively on first order ladder, second grade ladder and third grade ladder.

The lower surface of the upper cover is longitudinally provided with an upper plug, the upper plug is fixedly connected with the upper end of a central water collecting pipe of the reverse osmosis membrane through a connector, and the connector can be made of plastic directly.

Through holes are respectively formed in the concentrated water bin partition plate and the water storage bin partition plate and used for installing a reverse osmosis membrane, the reverse osmosis membrane is communicated with the water storage bin through the upper end face installed at the through hole of the water storage bin partition plate, and is communicated with the concentrated water bin through the lower end face installed at the through hole of the concentrated water bin partition plate.

Further, the through holes on the concentrated water bin partition plate and the water bin partition plate are respectively provided with a support for fixing and supporting the reverse osmosis membrane, so that the reverse osmosis membrane is prevented from moving up and down. The support may be fixed or removable.

The fresh water bin partition plate is provided with a branch pipe, and the reverse osmosis fresh water bin is communicated with a central water collecting pipe of the reverse osmosis membrane through the branch pipe; the branch pipe and the central water collecting pipe can be connected through a joint, and the joint is made of plastic directly.

The two ends of the tank body are provided with flange flanging, the flange flanging at the upper end of the tank body is combined with the upper cover, and the flange flanging at the lower end of the tank body is combined with the lower cover.

The upper cover and the lower bottom cover are respectively connected with the tank body through bolts. The upper cover is in a circular plate shape, and a plurality of bolt holes are distributed on the upper cover in an annular array mode and are used for being connected with the tank body through bolts.

Furthermore, the fresh water outlet is integrally arranged on the lower bottom cover and can also be realized through an adapter.

Preferably, the reverse osmosis unit still includes the adapter, and the adapter includes the head of cylinder and the annular joint main part of circle, the integrative perpendicular connection of head forms the structure that has the through-hole in the center that connects the main part, connects to be annular array distribution in the main part and has a plurality of bolt holes that are used for with the lower cover is connected, is equipped with the opening on the lower cover, through-hole and opening intercommunication form the fresh water export.

The joint of each part is provided with a sealing element, specifically, the joint of the upper cover and the tank body installation part, the joint of the lower cover and the tank body installation part, the joint of the fresh water bin partition plate, the concentrated water bin partition plate and the water storage bin partition plate and the installation parts of the first step, the second step and the third step, the installation parts of the upper end surface of the reverse osmosis membrane and the water storage bin partition plate through hole, the installation parts of the lower end surface of the reverse osmosis membrane and the concentrated water bin partition plate through hole, the installation parts of the adapter and the lower cover, and the joint are provided with the sealing element, and the sealing element is a sealing ring or a.

A reverse osmosis system comprises the reverse osmosis device, a buffer water tank, a high-pressure pump and a one-way valve, wherein the buffer water tank, the high-pressure pump and the one-way valve are sequentially connected, and the one-way valve is connected with the reverse osmosis device through a water inlet pipe.

The through-hole that sets up on concentrated water storehouse baffle and the reservoir baffle, the branch pipe that sets up on the fresh water storehouse baffle and the last end cap that covers on also can set up to a plurality ofly, and the reverse osmosis membrane quantity of being convenient for upgrade when reverse osmosis membrane quantity reduces, can plug up the through-hole of seting up on concentrated water storehouse baffle and the reservoir baffle with the end cap.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the reverse osmosis device of the utility model is arranged vertically, a plurality of reverse osmosis membranes which are longitudinally arranged are connected, so as to realize the series and parallel installation of the reverse osmosis membranes, and the membrane group can be upgraded according to the capacity requirement, thereby realizing larger water treatment capacity;

2) the high-pressure area is arranged above the tank body and is matched with the stepped inner wall to generate longitudinal pressing force from top to bottom, each partition plate and a joint surface are sealed by adopting a sealing piece, and the upper end cover and the lower end cover adopt a multi-O-shaped sealing ring and a labyrinth-shaped leakage-proof design to ensure that each cavity of the inner cavity forms good sealing, so that the problem of water leakage of a reverse osmosis membrane cavity is solved;

3) the water storage bin of the reverse osmosis device is positioned above the reverse osmosis device, water flows from top to bottom and flows downwards due to gravity, so that the working load of the pump is reduced, and the energy-saving effect is achieved;

4) the reverse osmosis device adopts a reverse osmosis membrane group which is longitudinally arranged, so that the device has the advantages of light volume, small occupied area, simple and convenient maintenance and installation, and can be operated by a single person, thereby reducing the error risk in the operation process; meanwhile, a reverse osmosis device can be independently used or a plurality of reverse osmosis devices can be used together in the reverse osmosis system, so that the water production efficiency and the water production capacity are further improved.

Drawings

FIG. 1 is a schematic diagram of a reverse osmosis unit according to the prior art;

fig. 2 is a schematic structural diagram of a reverse osmosis system according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional structure diagram of a reverse osmosis apparatus according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view A-A of FIG. 3;

FIG. 5 is a schematic view of a front view and a half-section structure of a tank body according to an embodiment of the present invention;

fig. 6 is a schematic top view of a tank according to an embodiment of the present invention;

fig. 7 is a schematic top view of the upper cover according to the embodiment of the present invention;

fig. 8 is a schematic front view and a half-sectional structure of the upper cover according to the embodiment of the present invention;

fig. 9 is a schematic top view of the lower bottom cover according to the embodiment of the present invention;

fig. 10 is a schematic front view and a half-sectional structure of a lower bottom cover according to an embodiment of the present invention;

figure 11 is a schematic top view of an adapter according to an embodiment of the present invention;

figure 12 is a front view semi-sectional structural schematic diagram of an adapter according to an embodiment of the present invention;

fig. 13 is a schematic top view of a partition plate of the fresh water compartment according to the embodiment of the present invention;

fig. 14 is a schematic view of a front view and a half-section structure of a fresh water compartment partition according to an embodiment of the present invention;

fig. 15 is a schematic top view of a dense water bin partition according to an embodiment of the present invention;

fig. 16 is a schematic view of a front view and a half-section structure of a concentrated water bin partition plate according to an embodiment of the present invention;

fig. 17 is a schematic top view of a partition board of a water storage compartment according to an embodiment of the present invention;

fig. 18 is a schematic view of a front half-section structure of a partition board of a water storage compartment according to an embodiment of the present invention.

Detailed Description

The reverse osmosis apparatus and reverse osmosis system provided by the present invention will be fully described in detail with reference to the following embodiments. The following examples are illustrative only and are not to be construed as limiting the invention.

A reverse osmosis device and a reverse osmosis system are disclosed, as shown in FIG. 2, the reverse osmosis system comprises a buffer water tank 501, a high pressure pump 502, a one-way valve 503, a water inlet pipe 505 and a reverse osmosis device 504. The reverse osmosis device 504 comprises a water storage bin 506, a reverse osmosis membrane cavity, a concentrated water bin 509, a concentrated water discharge pipe 510, a reverse osmosis fresh water bin 511, a fresh water outlet 512 and a plurality of reverse osmosis membranes 507 longitudinally arranged in the reverse osmosis membrane cavity, wherein the reverse osmosis membranes 507 are provided with a central water collecting pipe 508.

The buffer water tank 501, the high-pressure pump 502, the one-way valve 503 and the water storage bin 506 are sequentially communicated through pipelines, preferably stainless steel pipelines. The buffer water tank 501 is also provided with a water inlet. The upper end of the reverse osmosis membrane cavity is communicated with the water storage bin 506, and the lower end is communicated with the concentrated water bin 509. A plurality of reverse osmosis membranes 507 are arranged in the reverse osmosis membrane cavity, and the reverse osmosis membranes 507 are longitudinally arranged. The lower end of the central water collecting pipe 508 of the reverse osmosis membrane 507 is communicated with a reverse osmosis fresh water bin 511. The water storage bin 506 is positioned above the reverse osmosis membrane cavity, the water storage bin 506 is provided with a water inlet pipe 505, two ends of the water inlet pipe 505 are respectively connected with the check valve 503 and the water storage bin 506, the thick water bin 509 and the reverse osmosis fresh water bin 511 are positioned below the reverse osmosis membrane cavity, and the bottom of the reverse osmosis fresh water bin 511 is provided with a fresh water outlet 512. One end of the concentrated water discharge pipe 510 is communicated with the concentrated water bin 509, and the other end is connected with the collecting device or directly discharged.

The working process of the reverse osmosis system is as follows: the inlet water firstly enters a buffer water tank 501 through a water inlet of a reverse osmosis system, then is pumped and pumped by a high-pressure pump 502, and then enters a water storage bin 506 through a one-way valve 503 and a water inlet pipe 505, water in the water storage bin 506 enters a reverse osmosis membrane cavity from the upper end surface of a reverse osmosis membrane 507 arranged in the reverse osmosis membrane cavity under the action of gravity and pump pressure, part of the water is filtered by the reverse osmosis membrane 507 and then enters a central water collecting pipe 508, the water entering the central water collecting pipe 508 is reverse osmosis fresh water, the reverse osmosis fresh water flows into a reverse osmosis fresh water bin 511 at the bottom under the action of gravity and is finally conveyed out through a fresh water outlet 512, the water which does not enter the central water collecting pipe 508 in the reverse osmosis membrane cavity is called concentrated water, the concentrated water is discharged into a concentrated water bin 509 from the lower end surface of the reverse osmosis.

It should be noted that the reverse osmosis membrane 507 may be a product of the prior art, and redundant description of its structure is not provided.

The structure of the reverse osmosis device 504 is shown in fig. 3, and comprises a tank 606, an upper cover 603, a water storage bin partition 604, a concentrated water bin partition 607, a fresh water bin partition 608, a lower cover 609, an adapter 610, a plurality of bolts 601, a plurality of joints 602, and a plurality of O-ring seals 605. Wherein, the cavity between the upper cover 603 and the water storage compartment partition 604 is a water storage compartment 506, the cavity between the water storage compartment partition 604 and the concentrated water compartment partition 607 is a reverse osmosis membrane cavity, the cavity between the concentrated water compartment partition 607 and the fresh water compartment partition 608 is a concentrated water compartment 509, and the cavity between the fresh water compartment partition 608 and the lower cover 609 is a reverse osmosis fresh water compartment 511.

As shown in fig. 5 and 6, the can 606 is a straight cylinder, and flanges are provided at two ends of the can 606. The flange at the upper end of the can 606 is coupled to the upper lid 603, and the flange at the lower end of the can 606 is coupled to the lower lid 609. Further, flange flanges at both ends of the can 606 are coupled to the upper cover 603 and the lower cover 609 by a plurality of bolts 601, respectively. Therefore, the tank body 606, the upper cover 603 and the lower cover 609 are connected to form a body with a cavity inside, and the water inlet pipe 505 is communicated with the upper end of the cavity, the concentrated water discharge pipe 510 and the fresh water outlet 512 are respectively communicated with the lower end of the cavity. A plurality of reverse osmosis membranes 507 are mounted within the cavity.

In this embodiment, four reverse osmosis membranes 507 are provided.

As shown in fig. 5, the inner wall of the tank 606 is in a multi-step shape along the central line direction of the tank 606, and the first step, the second step and the third step are sequentially arranged from bottom to top. The first step, the second step and the third step are used for installing the partition boards, and specifically, the first step, the second step and the third step are respectively used for installing the fresh water bin partition board 608, the concentrated water bin partition board 607 and the water storage bin partition board 604.

As shown in fig. 7 and 8, the upper cover 603 is a circular plate, and a plurality of bolt holes are distributed on the upper cover 603 in an annular array for connecting with the tank 606 through the bolts 601. One side of the upper cover 603 is provided with a plurality of upper plugs perpendicular to the upper cover 603. The plurality of upper plugs are distributed in an annular array with the center of the circle of the upper cover 603 as the center.

In this embodiment, four upper plugs are provided.

As shown in fig. 9 and 10, the lower bottom cover 609 is a circular plate, and a plurality of bolt holes are distributed on the lower bottom cover 609 in an annular array for connecting with the tank 606 through the bolts 601. The center of the lower bottom cover 609 is provided with an adapter 610. The adapter 610, as shown in fig. 11 and 12, includes a cylindrical head and a circular ring-shaped connector body, the head is integrally and vertically connected to the center of the connector body to form a structure having a through hole. A plurality of bolt holes are distributed in an annular array on the connector body for connection with a lower base cap 609. An opening is formed in the lower bottom cover 609, and the through hole is communicated with the opening to form a fresh water outlet 512.

As another embodiment, the fresh water outlet 512 is directly disposed on the lower bottom cover 609, i.e. the fresh water outlet 512 and the lower bottom cover 609 are designed as a single body.

As shown in fig. 13 and 14, the fresh water compartment partition 608 is a circular plate, and a plurality of branch pipes distributed in an annular array around the center of the fresh water compartment partition 608 are disposed on one side of the fresh water compartment partition 608. The branch pipes are communicated with two sides of the fresh water bin clapboard 608. When the fresh water bin partition 608 is installed on the first step, the branch pipes face upward.

In this embodiment, four branch pipes are provided on the fresh water compartment partition 608.

As shown in fig. 15 and 16, the dense water bin spacer 607 is in the form of a circular plate, and through holes are formed in the dense water bin spacer 607 so as to be distributed in an annular array around the center of the circle of the dense water bin spacer 607. The outer diameter of the through hole is not larger than the diameter of the lower end surface of the reverse osmosis membrane 507 so as to prevent water from directly flowing out without passing through the reverse osmosis membrane 507. In this embodiment, four through holes are provided on the dense water bin partition 607.

As shown in fig. 17 and 18, the partition 604 of the water storage bin is a circular plate, and the partition 604 of the water storage bin is provided with through holes distributed in an annular array around the center of the circle of the partition 604 of the water storage bin. Preferably, the outer diameter of the through hole is not larger than the diameter of the upper end surface of the reverse osmosis membrane 507, so that water is prevented from directly entering the reverse osmosis membrane cavity without passing through the reverse osmosis membrane 507. In this embodiment, four through holes are formed on the partition 604 of the water storage bin.

As shown in fig. 15 and 17, through holes on the concentrate bin partition 607 and the water bin partition 604 are respectively provided with a bracket for fixing and supporting the reverse osmosis membrane 507. The support can be a fixed structure or can be detachably arranged. When the quantity of the reverse osmosis membranes 507 is less than that of the through holes, the redundant through holes and the fresh water bin branch pipes can be plugged by plugs.

The upper ends of the reverse osmosis membranes 507 are respectively arranged on a plurality of through holes on the water storage bin clapboard 604, and the lower ends of the reverse osmosis membranes 507 are respectively arranged on a plurality of through holes on the concentrated water bin clapboard 607. The upper end of the central water collecting pipe 508 of each reverse osmosis membrane 507 is connected with an upper plug of the upper cover 603 through a connector 602, and the lower end of the central water collecting pipe 508 of each reverse osmosis membrane 507 is communicated with a branch pipe on the fresh water bin partition 608 through a connector 602. In this embodiment, the connector 602 is plastic.

From the above, a plurality of reverse osmosis membranes 507, a plurality of upper plugs, a plurality of branch pipes on the fresh water bin partition 608, a plurality of through holes on the water bin partition 604 and a plurality of through holes on the water bin partition 604 correspond one to one. Based on the structure, the reverse osmosis device 504 is convenient to install, and the installation steps are as follows:

the first step is as follows: the adapter 610 is mounted on the lower bottom cover 609;

the second step is that: connecting and fastening the lower bottom cover 609 with a flange flanging at the lower end of the tank body 606;

the third step: the fresh water bin partition 608 is installed into the tank body 606 from the upper end of the tank body 606 and is installed on the first-stage ladder, so that the side, provided with the branch pipes, of the fresh water bin partition 608 faces upwards, and a connector 602 is installed on each branch pipe. The connector 602 is simple and convenient to install and is directly inserted into the branch pipe.

The fourth step: a concentrated water bin clapboard 607 is arranged in the tank body 606 from the upper end of the tank body 606 and is arranged on the second-stage ladder;

the fifth step: a plurality of reverse osmosis membranes 507 are arranged in the tank body 606 from the upper end of the tank body 606, the lower ends of the reverse osmosis membranes 507 are sequentially corresponding to a plurality of through holes of a concentrated water bin clapboard 607, the lower ends of a plurality of central water collecting pipes 508 of the reverse osmosis membranes 507 are inserted with a plurality of joints 602 on a fresh water bin clapboard 608 after passing through the concentrated water bin clapboard 607,

and a sixth step: the water storage bin partition plate 604 is arranged in the tank body 606 from the upper end of the tank body 606 and is arranged on the third-stage ladder; the upper ends of a plurality of central water collecting pipes 508 of a plurality of reverse osmosis membranes 507 are respectively inserted with a plurality of joints 602 after passing through the water storage bin clapboard 604,

the seventh step: an upper cover 603 is installed, and a plurality of upper plugs of the upper cover 603 are respectively connected with a plurality of joints 602 at the upper ends of a plurality of central water collecting pipes 508;

eighth step: the O-ring 605 is installed at the following positions: the joints of all the cover plates, the partition plates and the tank body 606 and the joints of the upper end and the lower end of the reverse osmosis membrane 507 and the partition plates; all cover plates comprise an upper cover 603 and a lower cover 609, and all partition plates comprise a water storage bin partition plate 604, a concentrated water bin partition plate 607 and a fresh water bin partition plate 608.

The ninth step: and (3) locking flange flanges at the upper ends of the upper cover 603 and the tank body 606 through a plurality of bolts 601 to finish the installation of the device.

Finally, it must be said here that: the above embodiments are only used for further detailed description of the technical solutions of the present invention, and should not be understood as limiting the scope of the present invention, and the modifications and adjustments made by those skilled in the art according to the above-mentioned contents of the present invention are all included in the scope of the present invention.

Claims (10)

1. A reverse osmosis device, which is characterized by comprising a water storage bin (506), a reverse osmosis membrane cavity, a concentrated water bin (509), a reverse osmosis fresh water bin (511) and at least one reverse osmosis membrane (507) which is longitudinally arranged in the reverse osmosis membrane cavity; the water storage bin (506) is positioned above the reverse osmosis membrane cavity, and a water inlet pipe (505) is arranged on the water storage bin (506); the concentrated water bin (509) and the reverse osmosis fresh water bin (511) are positioned below the reverse osmosis membrane cavity, and a concentrated water drain pipe (510) is arranged on the concentrated water bin (509); the reverse osmosis membrane cavity is communicated with a water storage bin (506) through the upper end of a reverse osmosis membrane (507), and is communicated with a concentrated water bin (509) through the lower end of the reverse osmosis membrane (507), the reverse osmosis membrane (507) is provided with a central water collecting pipe (508), and the lower end of the central water collecting pipe (508) is communicated with a reverse osmosis fresh water bin (511); the bottom of the reverse osmosis fresh water bin (511) is provided with a fresh water outlet (512).

2. The reverse osmosis apparatus of claim 1, wherein: comprises a tank body (606), an upper cover (603), a water storage bin clapboard (604), a concentrated water bin clapboard (607), a fresh water bin clapboard (608) and a lower bottom cover (609); the tank body (606) is a cylinder body, the upper end part and the lower end part of the tank body (606) are respectively connected with an upper cover (603) and a lower cover (609), a fresh water bin partition plate (608), a concentrated water bin partition plate (607) and a water storage bin partition plate (604) are sequentially installed in the tank body (606) at intervals from bottom to top, and an inner cavity of the tank body (606) is divided into a reverse osmosis fresh water bin (511), a concentrated water bin (509), a reverse osmosis membrane cavity and a water storage bin (506).

3. The reverse osmosis apparatus of claim 2, wherein: the inner wall of the tank body (606) is in a multi-stage ladder shape along the central line direction of the tank body (606), a first stage ladder, a second stage ladder and a third stage ladder are sequentially arranged from bottom to top, and the fresh water bin partition plate (608), the concentrated water bin partition plate (607) and the water storage bin partition plate (604) are respectively arranged on the first stage ladder, the second stage ladder and the third stage ladder.

4. The reverse osmosis apparatus of claim 2, wherein: an upper plug is longitudinally arranged on the lower surface of the upper cover (603), and the upper plug is fixedly connected with the upper end of a central water collecting pipe (508) of the reverse osmosis membrane (507) through a connector (602).

5. The reverse osmosis apparatus of claim 2, wherein: the concentrated water bin partition plate (607) and the water storage bin partition plate (604) are respectively provided with through holes for installing a reverse osmosis membrane (507), the reverse osmosis membrane (507) is communicated with the water storage bin (506) through the upper end surface installed at the through hole of the water storage bin partition plate (604) and is communicated with the concentrated water bin (509) through the lower end surface installed at the through hole of the concentrated water bin partition plate (607); the fresh water bin partition plate (608) is provided with a branch pipe, and the reverse osmosis fresh water bin (511) is communicated with a central water collecting pipe (508) of the reverse osmosis membrane (507) through the branch pipe.

6. The reverse osmosis apparatus of claim 5, wherein: the through holes on the concentrated water bin partition plate (607) and the water storage bin partition plate (604) are respectively provided with a bracket for fixing and supporting a reverse osmosis membrane (507).

7. The reverse osmosis apparatus of claim 2, wherein: the two ends of the tank body (606) are provided with flange flanges, the flange at the upper end of the tank body (606) is combined with the upper cover (603), and the flange at the lower end of the tank body (606) is combined with the lower bottom cover (609).

8. The reverse osmosis apparatus of claim 2, wherein: reverse osmosis unit still includes adapter (610), and adapter (610) include the head of cylinder and the annular joint main part of circle, the integrative vertical connection of head forms the structure that has the through-hole in the center of connecting the main part, is the annular array distribution in the joint main part and is used for and go up a plurality of bolt holes that the bottom cover (609) is connected, is equipped with the opening down on bottom cover (609), through-hole and opening intercommunication form fresh water export (512).

9. The reverse osmosis apparatus of claim 2, wherein: the mounting positions of the upper cover (603) and the tank body (606), the mounting positions of the lower cover (609) and the tank body (606), the mounting positions of the fresh water bin partition plate (608), the concentrated water bin partition plate (607) and the water storage bin partition plate (604) and the first step, the second step and the third step respectively, the mounting positions of the upper end surface of the reverse osmosis membrane (507) and the through hole of the water storage bin partition plate (604), and the mounting positions of the lower end surface of the reverse osmosis membrane (507) and the through hole of the concentrated water bin partition plate (607) are all provided with sealing elements, and the sealing elements are sealing rings or sealing gaskets.

10. A reverse osmosis system characterized by: the reverse osmosis device (504) comprises a reverse osmosis device (504) as claimed in any one of claims 1-9, and a buffer water tank (501), a high-pressure pump (502) and a one-way valve (503) which are connected in sequence, wherein the one-way valve (503) and the reverse osmosis device (504) are connected through a water inlet pipe (505).

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